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I hear everything and its opposite in the surfaces of tasting, specialty stores, DIY forums... I do not know what to worship and I really need your help! I plan to buy (if I can change the floor) an apartment in a building 1963 heated by the ground. I guess it's high temperature and the trustee does not know how to tell me the exact temperature. The apartment is on a pinion so the ambient temperature does not exceed 21 to 22° which suits me because I am chilly and would not like to lose degrees. There is currently mosaic parquet that I do not like; so I want to know what coating I can put (no carpet)? Should I remove the floor to prevent the heat from losing several degrees regardless of the new coating? I wanted to put parquet floor tiles but at Saint-Maclou I was told that I was going to lose 4 to 5°, at Leroy Merlin I was not told about it but they do not have the glue... The laminate Quick Step type, I was told it had to float what I do not like too much. Is it possible to lay glued parquet by gluing it? At worst, can I paint the floor? Thank you for helping me because I am in the greatest confusion.

The heated floors of the 1960s were characterized by tubes far apart from each other and a circulation of water at high temperature. These characteristics make it difficult to choose a new floor covering.
In general, even with modern heated floors, the goal is to heat the room, not the flooring. It is therefore necessary to avoid coatings too thick synonymous with a high thermal resistance, it is also necessary to avoid the essences of parquet unstable, such as beech, birch, chestnut... It is also necessary to avoid, even if some manufacturers authorize it, to install parquet and strafiés in floating installation, this pose creating an air gap which contributes to increase the thermal resistance of the floor covering. It is, moreover, not in conformity with the DTU.
Adding a parquet or tile by sticking it on the floor in place is not advisable, always for reasons of increase of the thermal resistance.
The laying of a plastic coating is also risky, because of the high temperature in line with the pipes.
To remove the parquet floor to replace it by another covering: parquet, tiles... is possible, but presents risks of partial loosening of the screed, with costs of reparation of the screed, important drying times, etc...
It remains effectively the solution paint... after sanding the floor and application of a product for the floor, without warranty, however of exceptional durability.

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